KR900010448A - Lighting system for LCD display system - Google Patents

Lighting system for LCD display system Download PDF

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Publication number
KR900010448A
KR900010448A KR1019890019213A KR890019213A KR900010448A KR 900010448 A KR900010448 A KR 900010448A KR 1019890019213 A KR1019890019213 A KR 1019890019213A KR 890019213 A KR890019213 A KR 890019213A KR 900010448 A KR900010448 A KR 900010448A
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KR
South Korea
Prior art keywords
prism
optical system
subbeams
subbeam
polarization
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KR1019890019213A
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Korean (ko)
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KR0152982B1 (en
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포러 골든버그 질
다니엘 에스킨 조슈아
Original Assignee
프레데릭 얀 스피트
엔. 브이. 필립스 글로아이람 펜파브리켄
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Publication of KR0152982B1 publication Critical patent/KR0152982B1/en

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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/13362—Illuminating devices providing polarized light, e.g. by converting a polarisation component into another one
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3141—Constructional details thereof
    • H04N9/315—Modulator illumination systems
    • H04N9/3167—Modulator illumination systems for polarizing the light beam
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133528—Polarisers
    • G02F1/133536—Reflective polarizers
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133528—Polarisers
    • G02F1/13355—Polarising beam splitters [PBS]

Abstract

내용 없음No content

Description

LCD디스플레이 시스템용 조명 시스템Lighting system for LCD display system

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제1도는 제1광빔과 그리고 제1광빔 방향으로 편광이 전환되는 제2광빔을 결합시키는 프리즘의 기하학 형태를 예시한 도면, 제2도는 LCD 투영 텔레비젼 시스템용 조명 시스템을 형성하는 편광빔 분광기 및 반사기와 관계하여 결합 프리즘을 예시한 도면, 제3도는 시스템의 효율을 극대화할 수 있도록 광을 분광시키고, 반사시키고 그리고 조합시키는 요소들이 두개의 인접하는 프리즘과 결합된 조명 시스템에 대한 제2실시예를 예시한 도면.1 illustrates the geometry of a prism that combines a first light beam and a second light beam whose polarization is switched in the first light beam direction, and FIG. 2 shows a polarization beam spectrometer and reflector forming an illumination system for an LCD projection television system. Figure 3 illustrates a coupling prism in conjunction with FIG. 3 shows a second embodiment of an illumination system in which elements that spectroscopically reflect, reflect, and combine light with two adjacent prisms to maximize the efficiency of the system. Illustrated Drawing.

Claims (11)

광빔을 직교 편광되는 두개의 서브빔으로 분광시키고 다시 상기 두개의 서브빔을 재결합시키며, 상기 광빔으로부터 각각 선형으로 편광되고 편광 방향이 서로 직교하는 제1 및 제2서브빔을 얻는 수단과 상기 서브빔 중 한 서브빔의 편광 방향을 90°로 회전시키는 수단을 구비하는 광학 시스템에 있어서, 최소한 제1, 제2 및 제3면을 포함하는 프리즘 수단과; 상기 제1 및 제2편광 서브빔을 상기 프리즘 수단쪽으로 향하게 하는 수단을 구비하며, 상기 제1수단은 상기 제1서브빔을 상기 프리즘 수단의 상기 제2면쪽으로 향하게 하여, 상기 제1서브빔이 상기 제2면으로부터 완전 내부 반사되어 상기 프리즘 수단의 상기 제2면쪽으로 향하게 되고, 상기 제3면에서 상기 제1서브빔이 상기 프리즘 수단을 출사하며, 상기 제2수단이 상기 제2서브빔을 상기 편광 회전 수단을 통해 상기 프리즘 수단의 상기 제2면쪽으로 향하게 하여 상기 제2서브빔이 상기 프리즘 수단내로 굴절되고 상기 제3면쪽으로 향하게 되어 있어 상기 제3면에서 상기 제2서브빔이 상기 프리즘 수단을 출사하도록 된 것을 특징으로하는 광학 시스템.Means for spectroscopically splitting the light beam into two orthogonally polarized subbeams and recombining the two subbeams again and obtaining first and second subbeams linearly polarized from each other and the polarization directions are orthogonal to each other and the subbeams CLAIMS 1. An optical system comprising means for rotating the polarization direction of one of the subbeams by 90 [deg.], Comprising: prismatic means comprising at least first, second and third surfaces; Means for directing the first and second polarization subbeams toward the prism means, wherein the first means directs the first subbeam toward the second surface of the prism means, such that the first subbeam Completely internally reflected from the second surface and directed towards the second surface of the prism means, the first subbeam exiting the prism means from the third surface, and the second means beaming the second subbeam The second subbeam is deflected into the prism means and directed toward the third surface through the polarization rotating means toward the second surface of the prism means such that the second subbeam is at the third surface. And an optical system adapted to exit the means. 제1항에 있어서, 상기 제1 및 제2방향 설정 수단이 프리즘의 면을 구비하는 것을 특징으로 하는 광학 시스템.An optical system according to claim 1, wherein said first and second direction setting means have a face of a prism. 제1항에 있어서, 상기 제1 및 제2방향 설정 수단이 거울을 구비하는 것을 특징으로 하는 광학 시스템.2. An optical system according to claim 1, wherein said first and second directional means comprise mirrors. 제1항에 있어서, 상기 제1방향 설정 수단 및 상기 프리즘 수단이 단일 프리즘을 구비하는 것을 특징으로 하는 광학 시스템.An optical system according to claim 1, wherein said first direction setting means and said prism means comprise a single prism. 제1항에 있어서, 상기 제2방향 설정 수단이 최소한 제1 및 제2면을 갖는 프리즘을 구비하고 상기 프리즘의 상기 제1면이 상기 제2방향 설정 수단으로써의 기능을 하는 것을 특징으로 하는 광학 시스템.2. The optical as claimed in claim 1, wherein said second direction setting means comprises a prism having at least first and second surfaces and said first surface of said prism functions as said second direction setting means. system. 제5항에 있어서, 상기 프리즘의 상기 제2면상에 상기 편광 회전 수단이 놓인 것을 특징으로 하는 광학 시스템.6. An optical system according to claim 5, wherein said polarization rotation means lies on said second surface of said prism. 제1항에 있어서, 상기 제1 및 제2서브빔을 얻는 수단이 편광빔 분광기를 구비하는 것을 특징으로 하는 광학 시스템.The optical system of claim 1 wherein the means for obtaining the first and second subbeams comprises a polarizing beam spectrometer. 제1항에 있어서, 상기 편광을 회전시키는 상기 수단이 1/2 파장판을 구비하는 것을 특징으로 하는 광학 시스템.An optical system according to claim 1, wherein said means for rotating said polarization comprises a half wave plate. 제1항에 있어서, 상기 제2서브빔의 상기 편광을 회전시키는 수단이 나선형 네마틱 액체 수정셀을 구비하 것을 특징으로 하는 광학 시스템.The optical system of claim 1 wherein the means for rotating the polarization of the second subbeam comprises a helical nematic liquid crystal cell. 제1항에 있어서, 상기 제1 및 제2방향 설정 수단이 제1 및 제2프리즘 수단을 구비하고, 상기 제1 및 제2서브빔을 얻는 상기 수단이 상기 제1 및 제2프리즘 수단 사이에 배치된 것을 특징으로 하는 광학 시스템.2. The apparatus of claim 1, wherein the first and second direction setting means comprise first and second prism means, and wherein the means for obtaining the first and second subbeams is between the first and second prism means. An optical system arranged. 광원과 그리고 이 광원으로부터 나오는 광을 빔으로 집중시키는 수단을 구비하는 LCD투영 디스플레이시스템 조명 시스템에 있어서, 상기 빔을 직교 편광되는 두개의 빔으로 분광시키고, 이 두개의 빔을 LCD 디스플레이 쪽으로 향하게 되는 합성 빔으로 다시 결합시키는, 상기 제 1, 2, 3, 4, 5, 6, 7, 8, 9 및 10항에서 주장된 광학 시스템을 구비하는 것을 특징으로 하는 LCD투영 디스플레이 시스템용 조명 시스템.In an LCD projection display system illumination system having a light source and means for concentrating light from the light source into a beam, the projection system spectrographs the beam into two orthogonally polarized beams and combines the two beams toward the LCD display. And an optical system as claimed in the first, second, second, third, fourth, fifth, sixth, seventh, eighth, nineth, and tenth, which recombines into a beam. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019890019213A 1988-12-27 1989-12-22 Illumination system for an lcd display system KR0152982B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/290,471 US4913529A (en) 1988-12-27 1988-12-27 Illumination system for an LCD display system
US290,471 1988-12-27

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KR900010448A true KR900010448A (en) 1990-07-07
KR0152982B1 KR0152982B1 (en) 1998-11-16

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US (1) US4913529A (en)
EP (1) EP0376395B1 (en)
JP (1) JP2747349B2 (en)
KR (1) KR0152982B1 (en)
CN (1) CN1020133C (en)
DE (1) DE68916398T2 (en)
HK (1) HK75496A (en)

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EP0376395A3 (en) 1991-01-23
JP2747349B2 (en) 1998-05-06
CN1043994A (en) 1990-07-18
DE68916398D1 (en) 1994-07-28
EP0376395B1 (en) 1994-06-22
HK75496A (en) 1996-05-10
CN1020133C (en) 1993-03-17
JPH02239219A (en) 1990-09-21
US4913529A (en) 1990-04-03
KR0152982B1 (en) 1998-11-16
EP0376395A2 (en) 1990-07-04
DE68916398T2 (en) 1995-02-02

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